public class BankTest {
    public static void main(String[] args) {
        Bank bank = new Bank();
        bank.addCustomer("张","三");
        bank.addCustomer("李","四");
        bank.getCustomers(0).setAccount(new Account(1000));   //获取张三的信息
        bank.getCustomers(0).getAccount().whitdraw(50);

    }
}
